This is a set of a sushi oke (tub) and trays for hand-rolled sushi. It's unclear if these three items were originally sold as a set, but their sizes are a perfect match, and they were stored together at my parents' house. The oke has two red lines, the large plate has a plum blossom pattern, and the tray has a maple leaf border. They said they haven't used them. Sushi oke: 36 x 36 x 7 cm Tray: 37 x 37 x 2 cm Large plate: 33 x 33 x 7 cm